07-25-2007 04:36 PM - edited 03-05-2019 05:29 PM
HI
Now duplex mismatch issue
power reset after
07-25-2007 04:46 PM
What is that can you brief us more on this or what exactly you require here.
Thanks EM-
07-25-2007 04:57 PM
Ok, Sorry
We use 3550-24SMI switch.
Today Ios Upgrade
c3550-ipservicesk9-mz.122-25.SEE3.bin
Upgrade before
c3550-i9q3l2-mz.121-13.EA1c.bin
Ios Upgrade After
Duplex mismacth happen
End-to-End
1case
A:100/FULL
B:A/A half operation
ios upgrade before no duplex mismatch
ios upgrade after duplex mismatch happen
We action
A:A/A
No happen duplex mismatch Configure change after
2case
A:100/FULL
B:AUTO/AUTO HALF opreation
B:100/FULL change Configure after no happen
07-25-2007 10:43 PM
Set both sides to A/A, or set your both sides to 100/F (or 1000/F if it's a Gigabit port)
Duplex is negotiated at the start. When you are using AUTO (A/A), there is negotiation, but when you have manual settings (100/F), no negotiation is taking place from that side!
I.E. Only side with A/A will negotiate duplex.
Negotiation implementation is not very consistent throughout vendors. So i would recommend switching to 100/F or 1000/F whenever you would experience problems.
I think the problem you got was because of switch reload, not because of switch upgrade. It was just luck that port got correct settings in the case before.
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